'GMA' Robin Roberts diagnosed with bone marrow disease

Good Morning America presenter Robin Roberts has revealed that she was recently diagnosed with a bone marrow disease.

Roberts revealed on the air today (June 11) that she developed myelodysplastic syndrome (MDS) during her treatment for breast cancer.

The journalist described MDS as a "a rare blood disorder that affects the bone marrow" and revealed that she will undergo a bone marrow transplant later this year.

Roberts was joined in the studio for the announcement by her sister, who will donate the bone marrow.

The 51-year-old newsreader told co-anchors George Stephanopoulos and Josh Elliott that her doctors believe she can make a full recovery and stressed that she will continue hosting GMA at least until the surgery.

"I want to be here... I don't have to be here. I want to be here while I can," Roberts told viewers.

Roberts's announcement of her MDS diagnosis comes five years after she began battling breast cancer. She underwent eight chemotherapy treatments to bring the cancer into remission.